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Finding the Fourth Proportional to 215,859, 297,885.42 and 126,435

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Solution

The fourth proportional to 215,859, 297,885.42 and 126,435 is: 174,480.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,859 : 297,885.42 = 126,435 : x
  2. Step 2: Convert to fraction form
    215,859/297,885.42 = 126,435/x
  3. Step 3: Cross multiply
    215,859x = 297,885.42 × 126,435
  4. Step 4: Simplify right side
    215,859x = 37,663,143,077.70
  5. Step 5: Solve for x
    x = 37,663,143,077.70/215,859
  6. Step 6: Final answer
    x = 174,480.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.